Factor polynomial $$ -64x^{2}+121 $$
Answer
$$ -64x^{2}+121 = ( -8x+11 )( 8x+11 ) $$
Explanation
Rewrite $ -64x^{2}+121 $ as:
$$ -64x^{2}+121 = 121 -64x^2 = (11)^2 - (8x)^2 $$Now we can apply the difference of squares formula.
$$ I^2 - II^2 = (I - II)(I + II) $$After putting $ I = 11 $ and $ II = 8x $ , we have:
$$ -64x^{2}+121 = (11)^2 - (8x)^2 = ( -8x+11 ) ( 8x+11 ) $$This page was created using
Polynomial Factoring Calculator